I am working in revit 2013 and am trying to draw some sanitary piping. I have my mains in and am drawing branch lines. When I extend those branch lines out it rotates the pipe a few degrees so I am no longer perpendicular to the main.
We had this problem on an earlier project when we were connection pipes to fixtures. It would rotate the branch a few degrees and move the mains. We fixed it by pointing our revit.ini files to the lookup tables (they were not looking in the correct area). I tried that on this project but the .ini file is looking at the correct lookup tables.
So far my work around has been to select the branch and hit draw pipe instead of extend.